CM119B IC Memory Chip C-MEDIA A Highly Integrated USB Audio Single
Chip
DESCRIPTION
The CM119B is a highly integrated, crystal-free USB audio single
chip solution optimized for USB headset, headphone, and dongle
applications such as VoIP (Voice over Internet Protocol). All
essential analog modules were embedded in the CM119B including dual
DAC and earphone driver, ADC, microphone booster, PLL, regulator,
and USB transceiver. It also supports 8GPIO pins. In addition,
audio adjustment can be easily controlled via specific HID
compliant volume control pins. Many features are programmable with
jumper pins or external EEPROM. Vendors can customize unique USB
VID/PID/Product String/Manufacture String and min/max/initial
volumes to EEPROM. The CM119B also comes with an anti-pop noise
circuits design and internal oscillator which can operate without
an external crystal oscillator.
FEATURES
Compliant with USB 2.0 Full Speed Operation
Compliant with USB Audio Device Class Specification v1.0
Supports USB Suspend/Resume Mode and Remote Wakeup with Volume
Control pins
On-chip oscillator that provides reference sources for PLL and
embedded USB transceiver
Jumper pin for Headset Mode (Playback + Recording) and
Speaker/Headphone Mode (Playback Only)
Jumper pin for Mixer Unit enable/disable under Headset Mode and
Power Mode setting
I2C interface to access internal registers for external MCU and
USB host
USB audio function topology has 2 Input Terminals, 2 Output
Terminals, 1 Mixer Unit, 1 Selector Unit, and 3 Feature Units
(Headset Mode)
USB audio function topology has 1 Input Terminal, 1 Output
Terminal, and 1 Feature Unit (Speaker Mode)
Anti-pop noise design for plugged and vice-versa
Deli electronics tehcnology Co.,Ltd.
www.icmemorychip.com
www.deli-ic.com
Email:sales3@deli-ic.com
Skype:hkdeli881
Contact: VIVI-CHEN
